Numerical accumulator



Nov. 16, 1943. F. G. WOOD NUMERICAL ACCUMULATOR Filed June 17, 1939'INVENTOR. Francis GaJVz'n Vlfood.

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Patented Nov. 16, 1943 NUMERICAL ACCUMULATOR Francis Galvin Wood, LosAngeles, Calif., assignor to Twentieth Century-Fox Film Corporation, LosAngeles, Calif., a corporation f New York Application June 17., 1939,Serial No. 279,711

(ci. zasi333 2 Claims.

This invention relates to tabulating machines and deals particular-lywith an improvement `in an adding wheel in the numerical accumulator.

To those versed in tabulating work it is known that certain tabulatingmachines embody numerical adding wheels or, as they are sometimestermed, accumulators. These devices tare used to show the sum which hasbeen accumulated `on the machine. However, in accumulating dollars andcents, for instance, the machine will oftentimes show fractions whichmust vin vthe iinal showing be corrected to the nearest Whole number.For instance, if there is less than fivetenths, the final result shouldshow the actual amount, but if there is five-tenths or more then thefinal result should show the next higher number. My invention has beenconceived and designed and may be applied to a conventional numericalaccumulator with slight modifications to render the wheel showing thefractions ad,- justable, so that when the adding wheel .showsrive-tenths or more the actual sum will read the next number above, andif it shows less Ithan fivetenths the actual sum will show on the wheel.My invention has been so designed that the wheel show-ing the fractionsmay be so adjusted that it will operate in the conventional manner, or

in the manner "described above.

The modification required is simple and :inexpensive and in actualpractice results in eliminating a great deal of personal factor vinoperating such machines# Other objects and advantages will .becomeapparent as the description proceeds in conjunction with the drawing, inwhich:

Figure l is a view showing the face oi an accumulator or, as previouslytermed herein, a nu` merical accumulator.

Figure 2 is a side View of an indicator wheel showing my inventionincorporated therein.

Figure 3 is a front view of Figure 2, showing the change in thenumerical indicia on the wheel.

Figure 4 is a cross sectional view, showing the changes brought about bymy invention, and is taken on line 1--1 of Figure 5;

Figure 5 is an enlarged fragmentary View taken on line 8-8 of Figure 2;and

Figure 6 is a View similar to Figure 5, showing another way in which myinvention may be applied.

Briefly stated, the invention amounts to changing the wheel whichaccumulates the fractions so that the carry over point, instead of beingbetween 9 and 0, is between 4 and 5.

Since the invention is directed to those skilled inthe art and dealsonlywith a :single adding wheel, no details of operating or attendantmechanism associated, with the wheel will be shown, it being deemedsumo-isnt to show that part` .of the `accumulator which has beenchanged.

In Figure 1 I have shown a view of a conventional accumulator window.that the numerals appear in a window H in .the conventional manner. Itis understood, :of

course, that :eac-h numeral appearing in the *wine dow Il represents .aseparate indicator wheel in the accumulator and that said indicatorWheels are driven by actuating mechanism in the ordinary manner.. If,for instance, the accumulator is set to read dollars and cents with thedecimal point indicated by the cross hatched par.- tition andif it isrequired that the accumulator show only equal cents, it is obvious thatunder ordinary practice the machine 4should print .$.50 instead of the$.49.5 shown in the wind-ow. The conventional :accumulator will not dothis. vIn Figures 2, .3, 4 and :5, I have shown means whereby aconventional numerical wheel `maybe converted vso that it will:automatically raise one-:half oentformore to actually read on theaccumulator the next cen-t above. Here it willl be noted that the unitcomprises awheel 2,2 having conventional numerals thereon :and that thevwheel .is equipped `with a gear 123` identical .to a conventional Wheel.The gear 23 is mounted upon the wheel 2.2 inv the usual manner. Thusfar, no changes :have been .made in lthe wheel ,from tire usualconstruction. On the opposite `side of the Wheel, however, I haveincorporated a change as follows: It will be noted that a carry overmember 24 is mounted on the opposite side of the wheel and that thismember has the usual conformation; that is, it carries the conventionalsynchronizing notches 25 and the conventional carry over nger 26.However, instead of xedly mounting the carry over member 24 upon theWheel 22, I fix this member so that the relation of the finger 26 to thenumerical indication on the face of the Wheel may be changed. I do thisby mounting a spacer block 21 between the member 24 and the wheel 22. Itis to be understood that the spacer block 21 is drilled to carry therequired number of holes to accommodate the pins 28 and the screws 29.Then, by cutting away the central portion of the carry over member 24and replacing it with a plate 3!! which has an undercut circumferentialedge 3| and, by so forming the remaining portion of the member 24 sothat itwill form a sliding fit under the Here it will be notedA edge 3|,the member 24 may be rotated relative to the wheel 22. Under thisarrangement the ringer 26 may be moved relative to the numericalindications on the face of the Wheel. Since the finger 2S is the carryover member, its relative position with respect to the numerals willdetermine the point at which the carry over takes place. As beforestated, in ordinary practice the carry over is between 9 and 0. However,in order to carry over a half cent or more to the next cent above, it isnecessary to put the carry over point between 4 and 5. Having shown aconstruction which will permit relative movement of the carry overmember 24 to the wheel 22, it remains only to show a means for lockingthe member 24 into position on the wheel 22. In Figures 2 and 3, I haveshown the iinger 26 as being set between the numerals 4 and 5 and haveshown a mechanism generally designated 32 for this purpose. Figure 5shows an enlarged View of this mechanism. Here it can be seen that theplate 30 is formed with a radial hole 32, into which a plunger 33slidingly ts. The plunger 33 is pressed outwardly by a spring 34 andcarries on its outer end a reduced pin portion 35. The pin portion 35 isadapted to t into a small hole 35 in the member 24. With thisarrangement the carry over member 24 is locked to the plate 30 landoperates to transfer its accumulation to the next succeeding wheel whenthe indicia shows or more. By carrying over between 4 and 5 instead ofbetween 9 and 0, the sum printed by the machine will always read thenext cent above when the Wheel showing the fraction of cents reaches 5.In this manner, the reading of $.495 will be automatically convertedinto $.50 Without any manual interference or operation. In order toconvert the wheel from one to the other set-ups, it is merely necessaryto depress the pin 35 so that it clears the dividing line between themembers 24 and 33 and then rotate the wheel 24 until the other hole 31comes into registration with the pin 35, whereupon the pin 35 will snapinto position and the member 24 is locked in another position. The twopositions represented by the holes 36 and 31 are the positions between 4and 5 and 9 and 0 respectively on the indicator wheels.

In Figure 6, I have shown another way of applying my invention, which isequally satisfactory to that already described. Here the same wheel 22and same gear 23 are employed and are mounted upon each other inidentically the same manner as previously described. On the oppositeside, which carries the carry over wheel, there is a difference in theway the carry over wheel is mounted for relative rotation with respectto the Wheel 22. In this form the plate 21 is attached to the Wheel 22by means of screws 29, while the carry over wheel 24 is rotatablymounted upon plate 21 by means of a rim 38 attached to the carry overWheel by a screw 39, said rim being undercut so as to form a sliding ton a complementary cut on the line 4D of the member 21. A detent pinarrangement generally designated 4I, similar to that designated 32 inFigure 2, is incorporated in the plate 21 and the rim 38 in the samearrangement as described in Figure 5. Either of the forms shown inFigures 5 or 6 may be used satisfactorily. There may be other formswhich will serve equally as well which are not shown here but which areintended to be covered by this disclosure.

The wheel, when treated in the foregoing manner, is adaptable for eitherconventional accumulation or for accumulation wherein the accumulatorautomatically carries over half cents or more to the next cent above.The modifica tion is simple and inexpensive and may be applied to aconventional accumulator with only slight modication. It does notinterfere with the normal operation of the machine and will convert aconventional accumulator into an accumulator especially adapted fortabulating where fractions of cents appear.

I claim:

1. In a numerical accumulator, a numeral wheel, a disc having a bevelededge concentrically secured to the side of said wheel, a ring having acarry over ringer thereon revolvably mounted on said disc, said ringhaving an internally beveled edge adapted to engage the beveled edge ofsaid disc and retain said ring movably thereon, and means for holdingsaid ring fixed in predetermined positions on said disc.

2. In a numerical accumulator, a numeral wheel, a disc concentricallyxed to the side of said wheel, a ring having a carry o-ver fingerthereon revolvably mounted on said disc, said ring and said disc havingcomplementary beveled edges to form a sliding engagement therebetween, aspring pressed shouldered pin mounted in a radial hole in said disc,said ring having spaced holes smaller than said radial hole extendingtherethrough adaptedl to receive the small end of said pin and form alocking engagement between said disc and said ring.

FRANCIS GALV'IN WOOD.

